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Short Citation:
National Centers for Coastal Ocean Science, 2024: NOAA Point Shapefile - 100m2 Fish Density for Dry Tortugas, United States, Project NF-08-06-SACS, 2008, WGS84, https://www.fisheries.noaa.gov/inport/item/38751.

Item Identification

Title: NOAA Point Shapefile - 100m2 Fish Density for Dry Tortugas, United States, Project NF-08-06-SACS, 2008, WGS84
Short Name: Fish_Acoustics
Status: Completed
Abstract:

The research mission was conducted in the Dry Tortugas, FL by National Ocean Service scientists from the Center for Coastal Habitat and Fisheries Research (CCFHR) during 2008 aboard the NOAA Ship Nancy Foster. The overall objective of CCFHR's research in the Tortugas is to examine the effects of implementation of the Tortugas North Ecological Reserve (TNER). The establishment of the TNER, a no-take reserve, in 2001 provided the opportunity to examine the response of the fish and benthic communities to the creation of a refuge for exploited reef fishes. Historically, exploitation of reef fishes in the Tortugas has focused on large predatory reef fishes, primarily snappers and groupers and, to a lesser extent, grunts. Trends in populations of these targeted species are expected to vary relative to geographic variation in fishing mortality (F). Increasing trends in targeted species abundance are expected in the TNER where all fishing was prohibited in 2001. Within adjacent areas managed as the Exclusive Economic Zone (EEZ), where both federally sanctioned commercial and recreational fisheries are permitted, exploited populations are expected to be depressed relative to those in the TNER. Within the Dry Tortugas National Park (DTNP) where fishing effort is limited to recreational hook and line fishing, trends in exploited species are expected to be intermediate to those observed in the TNER and EEZ. Cascading effects due to change in abundance of exploited species is expected to indirectly impact corals and other sessile benthic communities. Sampling to detect reserve implementation effects was conducted at the ecotone between the reef habitat of the banks and the surrounding soft-bottom shelf where the structure and composition of communities should provide sensitive indicators of a reserve effect. Energy flow across reef-sand boundaries is critical to reef communities. Energy and nutrients are imported to the reef by nocturnally foraging reef fish that feed in sand, algae, and seagrass flats adjacent to the reef. The majority of the TNER (approximately 70%) consists of soft-bottom shelf habitat, and previous work on the west Florida shelf suggests that benthic primary production is the major energy source supporting fish biomass. In addition to providing ecologically sensitive sampling locations, the interface between bank and shelf provided a distinct landscape feature suited to a comparative analysis of management impact. Observations were made using 1) a stratified-random survey design for scuba divers visual observations, 2) a systematic survey of fish and fauna using scientific splitbeam echosounders (fisheries sonar) to map fish densities and biomass on the shelf, coral and softbottom habitats.

Purpose:

1. To design and implement a mobile fisheries sonar survey in concert with multibeam echosounder hydrographic surveys to assess and map fish densities and biomass within and outside management zones. 2. To assess distribution of fish densities relative to management and ecological reserve boundaries and other differences that may be associated with management zones and habitat types, particularly as fish distributions relate to movements between habitat types. 3. To assess the extent of fish density distributions in comparison with diver visual surveys and fish community assessments.

Notes:

228

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
environment
ISO 19115 Topic Category
oceans
UNCONTROLLED
None 120kHz
None Coral
None ES60
None Fish Survey
None Fisheries Acoustics
None Hydrographic Acoustics
None NOAA
None Reef
None Simard
None Splitbeam Sonar

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
None Dry Tortugas
None Florida Keys
None Florida Keys National Marine Sancturay
None Gulf of Mexico

Physical Location

Organization: National Centers for Coastal Ocean Science
City: Silver Spring
State/Province: MD

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Distribution Liability:

These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA can not assume liability for and damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

Support Roles

Data Steward

CC ID: 440458
Date Effective From: 2011-12-05
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Distributor

CC ID: 440460
Date Effective From: 2011-12-05
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Metadata Contact

CC ID: 440461
Date Effective From: 2011-12-05
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Point of Contact

CC ID: 440459
Date Effective From: 2011-12-05
Date Effective To:
Contact (Position): NCCOS Scientific Data Coordinator
Email Address: NCCOS.data@noaa.gov

Principal Investigator

CC ID: 440462
Date Effective From: 2011-12-05
Date Effective To:
Contact (Person): Taylor, Chris
Email Address: chris.taylor@noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 440465
W° Bound: -83.113441
E° Bound: -82.92173
N° Bound: 24.880377
S° Bound: 24.583962

Extent Group 1 / Time Frame 1

CC ID: 440464
Time Frame Type: Range
Start: 2008-07-25
End: 2008-08-04

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

Contact Chris Taylor @ chris.taylor@noaa.gov;

Data Access Constraints:

Please cite any use of this data.

Data Use Constraints:

Not for Navigation

URLs

URL 1

CC ID: 440456
URL: http://www.ccfhr.noaa.gov/
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 440483
Activity Date/Time: 2011-12-05
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 440482
Activity Date/Time: 2017-04-05
Description:

Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 584233
Activity Date/Time: 2017-09-13
Description:

Partial upload of Spatial Info section only.

Technical Environment

Description:

ESRI ArcGIS 9.3

Data Quality

Completeness Report:

These data consist of fish densitys in the Dry Tortugas Florida Keys National Marine Sanctuary. The data was collected during corresponding multibeam operations.

Conceptual Consistency:

Not applicable

Lineage

Process Steps

Process Step 1

CC ID: 440451
Description:

Acoustic data was collected aboard the NOAA Ship Nancy Foster using ES120-7C splitbeam transducer. The Kongsberg ES120-7C tansducer was deployed using a moon pool. Kongsberg ES transceiver and Simard ES60 software was used in the data acquisition. Data was collected during all shifts of multibeam survey.

Process Date/Time: 2008-01-01 00:00:00

Process Step 2

CC ID: 440452
Description:

Echoview 4 was used in this step of the data processing. The .raw file formate was edited for erroneous ping returns and acoustic noise. Fish were track using a tracking algorithm and the fish tracks were export in a .csv formate.

Process Date/Time: 2010-01-01 00:00:00

Process Step 3

CC ID: 440453
Description:

Microsoft Office Excel 2007 was used to calculate the density and size of fish through out the water column. Divided fish into 100 meter square area and created a new workbook with the calculated fish sizes and densities.

Process Date/Time: 2010-01-01 00:00:00

Process Step 4

CC ID: 440454
Description:

Arc Catalog was used to convert the .xlsx file formate to shapefiles. Set the geographic coordinate system to WGS 84. Then merged the all the .shp file into one .shp file with all the trip data.

Process Date/Time: 2010-01-01 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity Fish Distribution by Size

Catalog Details

Catalog Item ID: 38751
GUID: gov.noaa.nmfs.inport:38751
Metadata Record Created By: Tyler Christensen
Metadata Record Created: 2017-04-05 12:48+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:09+0000
Metadata Record Published: 2017-09-13
Owner Org: NCCOS
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2017-09-13
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2018-09-13